Y CATALYTIC CRACKING CATALYST OF RARE EARTH-CONTAINING Y-TYPE MOLECULAR SIEVE AND PREPARATION METHOD THEREFOR

摘要

The present invention relates to a catalytic cracking catalyst and a method for preparing the same, wherein the catalytic cracking catalyst comprises a catalytic cracking active ingredient, an optional mesoporous aluminosilicate material, a clay and a binder, wherein the catalytic cracking active ingredient is a rare earth-containing Y type The rare earth-containing Y-type zeolite comprising, consisting of, or consisting essentially of zeolite, optional other Y-type zeolite and optional MFI-structured zeolite, has a rare earth content as rare earth oxide of 10-25 wt% , Eg 11-23 wt%; The unit cell size is 2.440-2.472nm, such as 2.450-2.470nm; Crystallinity is 35-65%, such as 40-60%; The Si / Al atomic ratio of the skeleton is 2.5-5.0; In the X-ray diffraction spectrographic zeolite 2θ = 12.3 ± 0.1 ° peak intensity I ₂ 2θ = 11.8 ± 0.1 ° the product of the rare earth% by weight as in the rare earth oxide ratio and the zeolite of the peak intensity I ₁ at 48 or higher for at, For example, it is 55 or more.